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"The highly complementary acquisition provides us with significantly increased geographic coverage, scale in installation activities and additional capabilities with an attractive testing and inspection base, all of which will enhance our market leading offering.

"We look forward to working with all the vendors of BEST who will remain in the business following the acquisition," said Mr Teasdale.

PTSG currently employs more than 450 people around the UK, servicing over 150,000 buildings for 12,000 customers in a wide range of industries.

Following the doubling of its share prices in the last two years, the company says it sees "huge opportunities" for further expansion through organic growth and acquisitions.